Missouri Permit Test Study Guide (2026)

Cover every topic on the Missouri DMV permit test, ranked by how often they show up on the real exam.

The Missouri Driver Guide is the only source the Department of Revenue uses for test questions. You can read it free as a PDF on dor.mo.gov. Cover signs, signals, lane use, right of way, parking, and the DUI laws. The Driver Guide also lists sample test questions you can review.

Missouri Speed Limits

Speed limits are one of the most-tested topics on the MO permit exam, and the questions usually test Missouri's statutory default limits -- what the speed is when no sign is posted. Missouri's highway defaults (RSMo 304.010) are 70 mph on rural interstates and freeways, 65 mph on rural expressways, and up to 75 mph where MoDOT sets it. In town, Missouri doesn't set one statewide default -- cities, towns, and villages set their own speed limits by ordinance (RSMo 304.120). School zones are a statutory 20 mph, enforced 30 minutes before, during, and 30 minutes after arrival and dismissal. Always obey the basic-speed law: never drive faster than is safe for current conditions.

Alcohol & BAC Limits

Expect at least one alcohol question on the Missouri permit test. Memorize the three BAC thresholds: 0.08% is the legal limit for drivers age 21 and older, 0.04% is the limit for anyone driving with a commercial driver license (CDL), and Missouri's zero-tolerance threshold for drivers under 21 is 0.02% -- the state sets it slightly above true zero to allow for things like communion wine. A first violation brings a 90-day license suspension (1 year for a second); 0.08% or higher brings full adult DWI charges. Missouri also has an implied-consent law: by accepting your license, you have already agreed to a breath or blood test if an officer suspects you of impaired driving.

Right-of-Way Rules

Right-of-way is the single most-missed topic across every state's permit test. The rules are simple once you memorize them. At a 4-way stop, the first vehicle to fully stop goes first; if two arrive together, the driver on the right has the right of way. At an uncontrolled intersection, yield to any vehicle already in the intersection and to the driver on your right. At roundabouts, yield to traffic already circulating and enter only when there is a safe gap. Always yield to pedestrians in any crosswalk, marked or unmarked, and to emergency vehicles with lights and sirens — pull right and stop. When turning left across oncoming traffic, you must yield to oncoming vehicles. Yield does not give you the right of way; it requires you to give it up.

Following Distance & Safety

The Missouri driver guide teaches the 3-second rule: pick a fixed point on the road, wait for the vehicle ahead of you to pass it, then count one-thousand-one, one-thousand-two, one-thousand-three. Missouri law separately requires a distance that's reasonable and prudent for conditions -- it doesn't name a specific number of feet, but following too closely is a Class C misdemeanor. Double or triple your following distance in rain, smoke, or fog.

Road Sign Colors & Shapes

Road signs on the MO permit test follow the federal Manual on Uniform Traffic Control Devices, so shapes and colors are consistent across the country. Memorize the shapes first: octagon always means stop, downward triangle means yield, diamond means warning, pentagon marks a school zone, round warns of a railroad crossing, and horizontal rectangle is a guide sign. Then learn the colors: red is stop or prohibition, yellow is general warning, orange is construction, green is directions and exits, blue is driver services, brown is recreation, and fluorescent yellow-green is for schools and pedestrians. Practice identifying signs by shape and color alone — see the full visual cheat sheet on our Missouri road-signs page.

Key Missouri Numbers to Memorize

If you only remember a handful of facts going into the test, make it these. Every one of them maps to questions that have appeared on the real MO exam.

Parking Rules

Parking questions on the Missouri permit test cover two patterns everywhere. For parallel parking, your wheels should be no more than 12 inches from the curb. For hill parking, the kerb rule decides which way your front wheels point: facing downhill (with or without a curb), turn the wheels toward the curb; facing uphill with a curb, turn the wheels away from the curb so they rest against it; facing uphill with no curb, turn the wheels toward the edge of the road. Always set the parking brake and leave the car in park (or in low gear with a manual).

Missouri's no-parking zones you must memorize: within 15 feet of a fire hydrant, within 20 feet of a crosswalk, within 30 feet on the approach to a flashing signal, stop sign, or traffic control signal, and within 50 feet of the nearest rail at a railroad crossing.

GDL Restrictions (MO)

Missouri's Graduated Driver License program: hold the instruction permit at least 182 days (about 6 months) and log 40 hours of supervised driving, including 10 at night. At 16, apply for an intermediate license -- you may drive alone except during a late-night curfew of 1 a.m. to 5 a.m. Passenger restrictions: no more than one passenger under 19 who isn't immediate family for the first 6 months, then no more than three for the second 6 months. You also need a clean record -- no alcohol-related conviction in the past 12 months and no traffic conviction in the past 6 -- to keep the intermediate license. Expect 1-3 GDL questions on the MO exam.

DUI & Drug Laws

DUI questions go beyond the BAC limits in Section 2. Three concepts you must know: implied consent means refusing a chemical test triggers automatic license suspension on top of any DUI charge. Prescription and over-the-counter drugs can also impair driving — antihistamines, sleep aids, painkillers, and some cold medicines list "do not operate heavy machinery" warnings, and driving impaired by them is a DUI even if you have a valid prescription. Marijuana — even where state-legal — is treated like alcohol for driving: any detectable impairment can result in a DUI, and edibles can take 1–3 hours to peak. The only safe BAC and the only safe THC level for driving is zero. There is no quick way to sober up; only time will lower your BAC.

Now Test What You've Studied

Five questions pulled at random from our Missouri question bank — a mix of road signs, traffic laws, and right-of-way. Answer to see the correct choice and a short explanation. For a full timed exam, take the free practice test.

Missouri Study Guide FAQ